No, the platform does not currently offer diplomas or certificates of participation. This may be possible in the future. Feel free to come back and visit the platform again.
However, please note that this certificate will never be issued by the WHO, as they do not issue this type of certificate.
You can, however, get badges from the University of Montpellier platform. These are not Open Badges, but platform badges. They are used to 'reward' success in the final quiz of each module.